Sundown Box Design ----------Questions

[tjennemann 0]

Here is some up front info

 

Vehicle : Gravedigger Powerwheel
Location in the vehicle: rear hatch, ported into front cab
Space available (Length x Width x Height):
Subwoofer make and model: SA-8 V1
Subwoofer Size: 8"
Number of Subwoofers: 1
Type of Port (Kerfed, Slot, Aero, etc.): 4" pvc
What type of music do you like?: just want a burp box.
Is your goal SPL or Everyday Music?: Mid 160's SPL
Tuning Freq (Hz): 40 give or take -
Volume : .5 - 1.0 cubic feet of space available. the box pictured below is .62
Questions:

 

Just joined the site. See this thread

http://www.soundsolutionsaudio.com/forum/topic/60250-powerwheel-time/

 

Anyways started a new design for my sons Powerwheel since I (we) are not happy with the 140db's it is putting up with an old 12" pioneer sub. So I almost forgot I had this Sa-8 V1 sub in my garage. Here is what I am thinking my design will end up being with the very limited space I have

 

 

 

Does anyone have any advice, suggestions before I start tearing into this project. As I am not familiar with this little sub at all. I have done a lot of research and everyone says no more than a cubic foot per sub. but it would be nice to have a good starting port and port length to prevent the already amount of trial and error I will be getting myself in to

[tjennemann 0]

Here is how the box turned out after a quick building session last night. Still needs carpet and paint all the good things to pretty it up. The total box volume is at .62 cubic feet.

 

 

 

I had 4" pvc laying around so I used that. but could only get  20" (using 2 90degree bends)

 

using this website:

http://www.carstereo.com/help/Articles.cfm?id=31

 

it says that my tuning frequency will be around 49 hertz

 

Now onto the question?

Would it be worth while using 3" pvc to create the same length port and having the frequency closer to 37 hertz?

 

 

This is a port wars style box. I am running an old American Bass CX-1500 amplifier to it. So I have all the power I need and then some